#if defined(__thumb__)
#define RETURN(x) bx x
#else
#define RETURN(x) mov pc, x
#endif

	.align 3
	.globl scheme_gmpn_invert_limb
	.type  scheme_gmpn_invert_limb,#function
scheme_gmpn_invert_limb:
        ldr     r2, .Lptr0
.Lbas0: add     r2, r2, r15     
        mov     r3, r0, lsr #23
        mov     r3, r3, asl #1
        ldrh    r3, [r3, r2]
        mov     r1, r3, asl #17
        mul     r12, r3, r3
        umull   r3, r2, r12, r0
        sub     r1, r1, r2, asl #1
        umull   r3, r2, r1, r1
        umull   r12, r3, r0, r3
        umull   r2, r12, r0, r2
        adds    r2, r2, r3
        adc     r12, r12, #0
        rsb     r1, r12, r1
        mvn     r2, r2, lsr #30
        add     r2, r2, r1, asl #2
        umull   r12, r3, r0, r2
        adds    r1, r12, r0
        adc     r3, r3, r0
        rsb     r0, r3, r2
        RETURN(r14)

.Lptr0:	.word	approx_tab-512-.Lbas0-8
	.size	scheme_gmpn_invert_limb,.-scheme_gmpn_invert_limb
	
        .section        .rodata
        .align  1
approx_tab:
        .short    0xffc0,0xfec0,0xfdc0,0xfcc0,0xfbc0,0xfac0,0xfa00,0xf900
        .short    0xf800,0xf700,0xf640,0xf540,0xf440,0xf380,0xf280,0xf180
        .short    0xf0c0,0xefc0,0xef00,0xee00,0xed40,0xec40,0xeb80,0xeac0
        .short    0xe9c0,0xe900,0xe840,0xe740,0xe680,0xe5c0,0xe500,0xe400
        .short    0xe340,0xe280,0xe1c0,0xe100,0xe040,0xdf80,0xdec0,0xde00
        .short    0xdd40,0xdc80,0xdbc0,0xdb00,0xda40,0xd980,0xd8c0,0xd800
        .short    0xd740,0xd680,0xd600,0xd540,0xd480,0xd3c0,0xd340,0xd280
        .short    0xd1c0,0xd140,0xd080,0xcfc0,0xcf40,0xce80,0xcdc0,0xcd40
        .short    0xcc80,0xcc00,0xcb40,0xcac0,0xca00,0xc980,0xc8c0,0xc840
        .short    0xc780,0xc700,0xc640,0xc5c0,0xc540,0xc480,0xc400,0xc380
        .short    0xc2c0,0xc240,0xc1c0,0xc100,0xc080,0xc000,0xbf80,0xbec0
        .short    0xbe40,0xbdc0,0xbd40,0xbc80,0xbc00,0xbb80,0xbb00,0xba80
        .short    0xba00,0xb980,0xb900,0xb840,0xb7c0,0xb740,0xb6c0,0xb640
        .short    0xb5c0,0xb540,0xb4c0,0xb440,0xb3c0,0xb340,0xb2c0,0xb240
        .short    0xb1c0,0xb140,0xb0c0,0xb080,0xb000,0xaf80,0xaf00,0xae80
        .short    0xae00,0xad80,0xad40,0xacc0,0xac40,0xabc0,0xab40,0xaac0
        .short    0xaa80,0xaa00,0xa980,0xa900,0xa8c0,0xa840,0xa7c0,0xa740
        .short    0xa700,0xa680,0xa600,0xa5c0,0xa540,0xa4c0,0xa480,0xa400
        .short    0xa380,0xa340,0xa2c0,0xa240,0xa200,0xa180,0xa140,0xa0c0
        .short    0xa080,0xa000,0x9f80,0x9f40,0x9ec0,0x9e80,0x9e00,0x9dc0
        .short    0x9d40,0x9d00,0x9c80,0x9c40,0x9bc0,0x9b80,0x9b00,0x9ac0
        .short    0x9a40,0x9a00,0x9980,0x9940,0x98c0,0x9880,0x9840,0x97c0
        .short    0x9780,0x9700,0x96c0,0x9680,0x9600,0x95c0,0x9580,0x9500
        .short    0x94c0,0x9440,0x9400,0x93c0,0x9340,0x9300,0x92c0,0x9240
        .short    0x9200,0x91c0,0x9180,0x9100,0x90c0,0x9080,0x9000,0x8fc0
        .short    0x8f80,0x8f40,0x8ec0,0x8e80,0x8e40,0x8e00,0x8d80,0x8d40
        .short    0x8d00,0x8cc0,0x8c80,0x8c00,0x8bc0,0x8b80,0x8b40,0x8b00
        .short    0x8a80,0x8a40,0x8a00,0x89c0,0x8980,0x8940,0x88c0,0x8880
        .short    0x8840,0x8800,0x87c0,0x8780,0x8740,0x8700,0x8680,0x8640
        .short    0x8600,0x85c0,0x8580,0x8540,0x8500,0x84c0,0x8480,0x8440
        .short    0x8400,0x8380,0x8340,0x8300,0x82c0,0x8280,0x8240,0x8200
        .short    0x81c0,0x8180,0x8140,0x8100,0x80c0,0x8080,0x8040,0x8000
